Builder motion



G. E. REPASS BUILDER MOTION June 26, 1951 8 Sheets-Sheet 1 Filed Sept. 23, 1948 INVENTOR. GEORGE EPEPASS BY I l ATTORNEY June 26, 1951 sg 2,558,526

BUILDER MO'UQN Filed Sept. 23, 1948 8 Sheets-Sheet 2 INVENTOR. GEORGE E REP/155 BY 7 v AT TORNE Y G. E. REPASS 2,558,526

BUILDER MOTION 8 Sheets-Sheet 3 June 26, 195] Filed Sept. 25, 1 948 INVENTOR. GEORGE E. REPASS iii? 2 .iial 4 G. E. REPASS BUILDER MOTION June 26, 1951 8 SheetsSheet 4 Filed Sept. 23, 1948 INVENTOR. 612012 GE E. 1252455 BY J M4 Kw? ATTORNEY I June 26, 1951 REPASS 2,558,526

BUILDER MOTION Filed Sept. 25, 1948 8 Sheets-Sheet 5 N "X INVENTOR.

\x K GEORGE EREPA-SS 104 68 By W 4 G. E. RE PASS BUILDER MOTION June 26, 1951 8 Sheets-Sheet 6 Filed Sept. 23, 1948 55 INVENTOR.

GEORGE E. REPASS ATTORNEY June 26, 1951 Ass 2,558,526

BUILDER MOTION Filed Sept. 23, 1948 8 Sheets-Sheet 7 IDLE MOVEMENTX f:-

BUILDING MAIN PACKAGE IIIII'HHIIIIIPIIIIII RAIL MOVEMENT AT TOP OF PACKAGE IIIJHIIIII IIIIIIIIIIIIIIIIIIIIIIIII II I WI" II IIIIIIIIII ii llllllll AT TOP OF PACKAGE BUILDING MAIN PACKAGE 5 15 W IND IIIIilllliiliiiliifillfiiliillli IDLE MOVEMENT RAIL MOVEMENT AT ToP OF PACKAGE IIIIIIIHIHIIHIQ Ill! l I: :IIIIIUIIIIIIIIMIIIIII I BUILDING MAIN 72 a 68 IDLE MOVEMENT PACKAGE WIND DOWN I I INVENTOR.

GEORGE E. REP/155 ATTORNE) June 26, 1951 Ass 2,558,526

BUILDER MOTION Filed Sept. 25, 1948 8 Sheets-Sheet 8 INVENTOR. GEORGE E, REP/15$ ATTORNEY Patented June 26, 1951 BUILDER MOTION George E. Repass, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass a corporation of Maine Application September 23, 1948, Serial No. 50,857

19 Claims. 1

This invention pertains to certain improvements in builder motions for spinning or twisting machines and the like, and more specifically, is concerned with improvements in that type of builder motion adapted automatically to control the formation of yarn packages of varying types and to control the movements of the movable rail of the machine from the start of package formation to the finish thereof, to return the parts to that position which they most desirably occupy at dofling, and to stop the machine.

It is a general object of the invention to simplify builder motions of the type described, to render more automatic such motions and to provide for automatic control of the movable rail (either ring rail or spindle rail) during the formation of yarn packages of virtually all types, thereby to make possible greater uniformity of work, and to facilitate the work at doffing.

It is another object of the invention to provide a builder motion which will control automatically the formation of the yarn package and precisely effect certain changes in the functions of the traversing and building of the package up to and including return of the mechanism to a posi-. tion for doffing, thereby to eliminate errors due to the vagaries of human judgment.

Another object of the invention is that of providing a builder motion which shall be adapted to control the formation of various types of yarn packages and to stop the winding of the package at a predetermined point and return the movable rail to a position for doifing thereby winding a tail at the outside of the yarn package and wrapping that tail about the package for a desired number of revolutions and at a point such that doihng may easily be effected without any chance of damaging the formed package or its tail-winding. It is also intended to provide for the very best conditions which permit easier withdrawal of the yarn end as the package is subsequently employed in a loom battery or in any other desired way.

It is a further object of the invention to devise a builder motion which is adapted with only slight change of certain cams and attendant parts to control the formation of the various types of Weft and warp wound packages, or combinations of these.

It is a more specific object of the invention to devise builder motion controlling means of comprehensive nature which may be widely varied by the ready substitution of cams within a quickly detachable cam group which forms the basis of control for the entire unit.

It is a further object of the invention to devise a builder motion which shall be adapted to control all functions incidental to the winding and formation of the package automatically and which shall control the said functions through a unitary cam group on a single and convenient shaft which group is rotated throughout a single revolution during each cycle of its operation.

A further object is that of providing in a builder motion of this type a control for changing the speed at which certain of the parts function to provide a relatively rapid rate of movement throughout certain phases of movement for the parts, and to so control the change from a relatively slow to a rapid rate of motion for the unitary cam group and other parts, that the change of speed may selectively be determined to occur on upward strokes of the builder motion or for downward strokes thereof and, correspondingly, for the desired directions of movement for the movable rail (either ring or spindle rail).

It is a further object of the invention to provide improvements in builder motions of the type described including delay mechanism by which the rotation of the cam group is retarded for certain controllable angular periods of movement, thereby to permit more functions to be governed and greater selectivity as to the time at which certain functions are to be changed during any given angular movement of the cam mechanism.

Other objects of the invention will become apparent from the following more-detailed description.

According to the prior art certain automatic types of builder motions have been devised by which the return of the movable rail is governed and by which certain functions incidental to building yarn packages are controlled automatically and more or less independently of the efforts of the machine operator. It is also to be understood that builder motions in which more than one speed of movement for the packagebuilding and rail-controlling cams or other means has been provided are known. In such devices the complication of mechanism has frequently been so great that they have not been practicable for use and, so far as applicant knows, it is a fact that automatic builder motions adapted to control the entire cycle of operation for the movable rail of the spinning or twisting machines are not employed commercially and thus, manual control of the elements is still relied upon to a relatively great extent.

The manual control is obviously subject to the human element and when it is desired to wind 3 different types of packages which involve a degree of complication, such, for example, as the precise control of the tail-winding and the stopping of the movable rail at such points that the tail-winding shall be wrapped about the yarn package at a particular point, manual operation is always open to serious criticism since no two operators tend to control the various functions similarly and, in fact, it is difficult to obtain any degree of uniformity at all.

For some purposes a tip bunch, so-called, is wound on the tip of a shuttle bobbin. This bunch is employed to assist in finding the yarn end preparatory to retaining the end of yarn in automatic type loom batteries. When tip bunches are to be formed, the manipulation of a ring or spindle rail to provide a properly sized bunch and to place it correctly with respect to the end of the main package and the end of the bobbin itself requires something more than manual control. The mechanism hereinafter described in greater detail, and which is subject matter of the appended claims, is particularly adapted to be employed in machines of the type described and which are to be utilized for the winding of special packages such as those herein mentioned. It is to be understood that the mechanism is not limited to employment only for these more or less specialized problems, but is decidedly advantageous when employed in all spinning and twisting machines including those for forming simpler types of yarn packages.

According to the invention, the builder motion has a main builder arm pivoted at a convenient point adjacent one end and has a follower or trundle roll engageable by a traverse cam which may be adapted to impart the usualweft-winding movementor may be a heart-shaped cam adapted to form a warp-wound package. A supplementary or auxiliary builder arm pivoted conveniently adjacent the pivot point for the mainarm has at its free end a connecting means by which a chain or cable or other satisfactory mechanism transmits and imparts the motion of the builder arm to the movable rail or rails, either the ring rail or spindle rail, dependent upon which of these rails happens to be movable.

A cam unit or cam group comprised of three independent cams, but which are interconnected by suitable bolts or other means so that they form a functionally unitary structure, are rotatable on a pivot, preferably a spindle projecting from more or less the central section of the main builder arm and located between that arm and the auxiliary arm. These cams comprise a builder cam, a wind-down cam and a timing cam and each may be formed in accordance with the dictates of the package which it is desired to wind and in accordance with peculiarities of the machine to which the builder motion is ap-- plied so that this unit which may be interchanged, or in which the independent cams then selves may be replaced by others at will, serves as a control means by which the ultimate pack-- age formed may have virtually any desired characteristics within the scope of the basic machine.

This cam unit is intended to be rotated throughout a single revolution incidental to each. cycle of operation, that is, incidental to the winding of one complete yarn package and return of the attendant mechanism to its initial or to a dofiing position. When the term one complete yarn package is used it is to be understood that these machines are adapted to wine a relatively great number of yarn packages at one time, but that all are formed simultaneously so that the entire group of packages are started together, and are finished and the mechanism returned to doffing position simultaneously.

For rotating the cam unit a gear drive means is provided which comprises a worm and worm wheel, the former preferably being fixed to the usual pick shaft at one end of which is provided a pick wheel and a stop and advancing pawl, these being more or less conventional. That pick wheel and the pick movement provided thereby are adapted to rotate the cam group at a relatively slow rate of speed in accordance with the requirements for building the main yarn package, and it is to be understood that for the other functions incidental to package formation and to completing the tail-wind and returning the parts to doffing position, a relatively rapid rate of speed of movement for certain of the parts including the auxiliary builder arm is desired. To provide that more rapid rate of movement, a continuously driven source of power is provided at the opposite end of the pick shaft and means for interconnecting the pick shaft to and disconnecting it from this source of power will hereinafter be de scribed in greater detail. The control for the more rapid rate of speed which involves moving a gear into and out of engagement with the source of power is governed from the said tim ing cam.

The change from the relatively slow pick wheel speed as applied to the cam group to-the more rapid speed may occur at any desired time, but is preferably controlled to occur either during the upward stroke of the builder or downward stroke thereof, and, of course, during a corresponding movement of the ring or spindle rail as controlled by the builder motion. For example, it is desirable to effect certain changes such as that change from slow to rapid rate of movement when a tip bunch is to be wound, during the upward movement of the rail. Certain other functions might more desirably be controlled to occur during the downward stroke thereof. For effecting the change from one speed to the other when desired, andduring a stroke in a particular direction, a latch means capable of being set in either of two positions is provided. It is so formed that it permits movement of a control lever and follower so that the latter falls from the periphery or other governing contour of the timing cam during one particular direction of operation for the parts.

The unitary cam group, movable throughout a single revolution incidental to the completion of one cycle of operation for the mechanism, is rotated very slowly throughout a considerable part of its movemena but the rapid rate at which it becomes necessary to move the parts for controlling the otherfunctions makes it desirable to have an auxiliary control by-which that part of the single revolution last mentioned may be further governed incidental to the formation of different types of tail-windings, securing of the yarn at the lower end of the package by a greater or lesser number of turns, and other functions requiring a greater or a lesser period of time for their accomplishment. To effect that additional control, supplemental means is provided by which the rapid rotation of the cam group is halted. or delayed for a short period of time, variable to an extent, and by which the rapid movement 0: the parts may be so controlled as to provide for the contingencies above outlined. According to 931 .form the said delay mechanism may take, a

group and to re'turn the parts to that position at.

which they are rotated at a relatively rapid rate until control is again changed by the timing cam itself. Different forms which this latter mecha nism may take will hereinafter. be described in detail.

The construction of the various parts of the builder motion will hereinafter be more fully set forth and it is to be understood that this disclosure, limited as it is to a single and preferred embodiment which the invention may take, is given by way of illustration and is not to be interpreted as limiting the mechanism to the precise details disclosed. The following description makes reference to the accompanying figures of drawings wherein:

Fig. 1 is a perspective view taken at one side of the builder motion showing the general arrangement of parts.

Fig. 2 is a view similar to Fig. l, but showing the mechanism as seen from the pick shaft end and from the underside.

Fig. 3 is an elevation showing part of a typical spinning frame to which the builder motion has been applied.

Fig. 4 is a perspective view showing parts o the builder motion adjacent the end at which the constantly rotating gears are positioned and also showing part of a mechanism by which the cam unit is caused to delay during its rapid rotation.

Fig. 5 is a top perspective view showing the side of the builder motion at which the traverse functions.

Fig. 6 is a perspective view showing a modifie v form of mechanism for operating the cam unit delay parts.

Fig. 6a is a detail view of one of the tension springs and a collar used at certain parts of the device.

Fig. 7 shows in a fragmentary perspective view the modification of the device necessary to win" a warp package, also part of the latch means which functions upon change from slow to rapid rotation of the parts.

Fig. 8 is a view similar to Fig. '7, but showing the devices which control winding of a warp wound package as they appear at the opposite end of their movement.

Fig. 9 is an elevational view showing the parts involved and mode of operation for that means which controls stopping during the upward stroke of the builder motion.

Fig. 10 is a section taken through the cam group and attendant parts.

Fig. 11 is a perspective detail view of the bunch builder quadrant and its holding pawl.

Fig. 12 is a similar view showing details of the delayed action sector which functions in conjunction with the timing cam.

Fig. 13 is a plan view of the builder cam showing those parts of its periphery which are active in controlling certain functions of the winding.

Fig. 14 is an end view of the cam shown in Fig. 13.

Figs. 15, 16 and 17 and '18 are corresponding views of the wind-down cam .and timing cam,

respectively.

Figs. 19 and 20 are a plan view and end view, respectively, of a sector functioning as a part of the timing cam and by which the effective package-building contour thereof may be governed as to its length.

Fig. 21 is a view showing the timing cam and the sector of Fig. 19 as combined and the manner in which the sector .is employed to vary the length of the wound package.

Fig.22 is a view similar to Fig. 21, but showing the delay mechanism of Fig. 12 as applied thereto.

Fig. 23 is an elevational view of a typical weft package wound on a shuttle bobbin and showing the manner in which a tail may be wound down about the package and the end terminated at such point as to facilitate dofling and to make the end more easily handled in subsequent operations.

Fig. 23a is'an elevational view of a warp wound package in which the winding has been so terminated as to facilitate doi'l'ing and finding the end.

Fig. 24 is a detail view of the spring and collar by which the bunch builder is moved to its operative position.

.Now referring to Fig. 3,, a more or less typical 7 spinning frame has been illustrated in part and has the end frames 25 and 26 between which extend longitudinal members 2] having at then" upper portion the so-called spindle rail 28 upon which are carried a plurality of spindle assemblies 29 adapted to receive bobbins or other yarn carriers on which are to be wound packages such, for example, as the typical weft-wound packages .36 to be employed as filling in fly shuttle type looms. A second rail known as a ring rail 31! is superimposed above each of the spindle rails and this ring rail carrying a plurality of rings and travellers, one .for each spindle, is

traversed vertically in accordance with motion 32 spaced at intervals along the rail and bearing on the levers 33 pivoted at 34 on bracket 35 and which are adjustable and form a part of other control means including the more or less vertically extending arms '36 to which are connected the flexible connectors or chains 31 run& ning over sheaves 33 and in turn, connected at their lower end by means of a turnbuckle 39 to the free end of an auxiliary builder arm 40, Figs. 1 and 2.

The builder motion generally indicated in Fig. 3 by numeral 41 is attached by suitable connecting means beneath the longitudinal members 21 and to the end frame 26 so that it is maintained in proper operative relationship to a traverse cam 42 fixed to a shaft 43 extending through the end frame bracket .or bearing 54 to termi nate in a driving connection meshing with conventional drive means in the end frame of the machine, not necessarily to be shown here since 7 the same is well known to those skilled in the art. The traverse cam is removable, but for weftwound packages may have either three or four lobes of the usual type for forming that package, or, if desired, may have substituted therefor a heart-shaped cam adapted to control winding of a warp-wound package.

Now referring to Figs. l-6, the builder motion comprises among other parts, a main builder arm designated by numeral 45 and pivoted at a bearing 46 on a sleeve which is in turn pivoted on the shaft of spindle 41. This shaft extends through a bearing 68 in a bracket 49 attachable to the end of the spinning machine or to some other permanent or fixed part thereof The arm 45 is adapted to be moved upwardly and downwardly throughout a limited angular extent about its pivoted end as dictated by the cam lobes on the cam 42, these lobes bearing against the follower 50 freely rotatable in bracket and slidable vertically in the depending extension 52 and retained in an adjusted position by the clamping bolts 53, Fig, 2.

As seen in Fig. l, the arm 45 tends to be swung upwardly about its pivot under the influence of counterweight 5 attached at the end of a hooked connecting member 55 which engages over a lip on the bearing portion of the arm. This weight may be rendered adjustable along the length of the connecting piece, or different weights may be attached depending upon the counterbalancing effect desired. a

A second or auxiliary builder arm designated by numeral and shown most clearly in Figs.' 1 and 2 is pivoted at a stud projecting from the main builder arm and extending laterally to serve as a bearing for the end of the said auxiliary arm 40 and for the other parts hereinafter to be described. The auxiliary arm 40 has at its free end a plurality of openings to one of which the connecting attachment for the chain or other flexible connector running to the rail moving levers is connected. These openings or holes serve as a means of adjustment for the stroke of the rail. A follower 51 pivoted on" a short stud about intermediate the length of the auxiliary builder arm 40 is contacted by cam means hereinafter to be identified and described more thoroughly.

The traverse cam 42 imparts a continuously reciprocating movement to the builder arm 45 and incidentally, through connections to the auxiliary arm 40, a similar reciprocatory movement to that rail of the machine which is to be moved to and fro for traversing the yarn in the formation of the main package. The auxiliary arm 40 is also to be moved gradually and periodically throughout a predetermined part of the cycle so as to build the traversed layers one upon another, until completion of the package. For that purpose a cam designated by numeral 58 and termed a builder cam is rotated at a speed consistent with the requirements of the building function. Cam 58 shaped as shown in Figs. 13 and 14, although it is to be understood that the details of the active contour thereof may be varied, is free to be rotated on a stud 59 fixed to the main builder arm 45, through it supporting gear and sleeve which comprises a worm gear 60, hub 8! and the projecting sleeve 62 which extends along and is freely rotatable upon the said stud.

A shaft 63 shown in Figs. 1, 2 and 10 is carried the pick shaft, carries thereon intermediate the said bearings, a worm 66 engageable with worm wheel 60 and adapted to drive that wheel and the cam 53 at varying speeds as hereinafter described.

The cam 58 forms only one element of a cam group which is herein termed a cam assembly or unit and comprising in addition, the wind-down cam 61 and timing cam 68. These latter cams are all shown in detail in Figs. 15-18. A screw 69 interconnects cams 6'! and 58 to the hub of the worm gear while another screw designated by numeral 10 attaches the timing cam 68 to the cam 61. These cams are constituted as a unit when thus attached and rotation of the worm wheel brings about a corresponding turning of the cams themselves.

Now referring to Figs. 19, 20 and 21 in addition to Fig. 10, acamsegment H having a hub 12 is adapted tobe clamped at the end of the sleeve 62 in such a position as to vary the efiective length of one portion of the cam contour of the timing cam 58. The manner in which this segment functions will be described in more detail later.

As shown in Figs. 1, 2, 4 and 10, an interconnecting link 13 is fixed at the outer ends of the stubs 56 and 59 and serves to maintain them in properly spaced relationship. This connecting link 13 has an intermediate hub 14 through which extends one end of a third stud 15, the otherend of which projects through to be fixed in a boss in alignment therewith in the main builder arm 45.

Now referring to Figs. 1 and 2, the pick shaft 63, supported at its forward end in a bearing 17 and maintained in axial position by a collar 18, carries at the opposite side of the bearing a pick wheel 19 having a squared hub for accommodating a hand crank as is the common practice. The pick wheel 19 is adapted to be contacted by a pawl 8| pivoted at the outer end of arm 82, that arm extending in one direction from hub .83 which is oscillated to and fro by contact of a fixed element adjacent that end of the builder motion and which is adapted to engage an extending arm projecting in the opposite direction from the arm 82. These are conventional parts of a pick movement and their function isunderstood by those skilled in the art so that more detailed illustration and description is not necessary here. It is suflicient to say that the pawl BI is pressed against the pick wheel by suitable spring means and that the wheel is prevented from reverse rotation by a stop pawl 84.

Again referring to Figs. 1, 2, 4 and 5, the shaft 47 carries at its outer end a sprocket driven by a chain passed about a sprocket continuously rotated by some part of the mechanism (not shown). other convenient mechanism depending upon the construction of the spinning or twisting machine to which the builder motion is applied. The shaft extends through in the direction of the auxiliary arm to have connected at its end opposite the sprocket a spur gear 86. The gear 85 meshes in turn with a second gear 8! rotatable on stud 58, and which also carries at its inner end or that end adjacent the main builder arm, a bevel gear indicated by numeral 88. The gear 8'8 is adapted to beinterconnected for meshing with a second bevel gear 89 carried at the end of the shaft 63 opposite the pick movement and adapted to be slid lengthwise of the end of that shaft so as to be disengaged from or to engage the said gear 88 depending upon whether or not the pick shaft is This shaft 47 may be driven by any 'poses. 'the cam is seen in Fig. 13 and considering that to be driven through the pick mechanism or at 2. much more rapid rate of speed through the gears just described.

A casing 90 is provided for covering the gears as and s1 and it is to be understood that the gear driving parts which include the sprocket 85 and the shaft and gears just mentioned may be varied in any manner desired depending upon the direction of movement which the parts are to have and also depending upon the relative speed desired and other factors.

Gear 89 is provided with a hub 9| grooved as at This shifter arm 9'5 is pivoted on the more clearly in Fig. 5, and has attached thereto an arm 96 which projects forwardly and to a point above the timing cam 68 having semi-cylindrical follower 91' for engagement with the oper ative cam contours thereon.

Now'referring to Figs. 1, 2,5, 13 and 14, the builder cam '8 has several different portions of its active periphery or contour which are adapted to control the movements of the auxiliary builder arm 40 at different times and for different pur- Starting at the lower portion thereof as the cam rotates in a clockwise direction as viewed in that figure, the portion marked building'main' package, is controlled by movement *of the pick wheel and, of course, the cam moves at a relatively slow speed at that time. Depending upon the type of package to be built, the

extent thereof, and other considerations, this part of the cam may be of greater angular extent, may be more steeply inclined, or otherwise altered to serve the particular purpose for which it is to be utilized.

That portion of the angular extent of the cam marked rail movement at top of package may be used for controlling the position of the auxiliary builder arm after the main package has been finished and preparatory to the wind-down of the rail. For example, that part may be used to elevate the ring rail or lowerthe spindle rail slightly preparatory to winding the so-called tip bunch and for maintaining the rail in proper position'during the winding of such a bunch.

The extent of movement at that particular time and contour of the cam at that portion thereof may be varied to space such a tip bunch closer or farther from the mainpackage and to winda larger or smaller bunch as may be desired. It is also to be understood that after the completion of the main package, the mechanism is preferably shifted from the pick movement'to'the more rapid gear drive so that the cam will travel for about 90, more or less, ata relatively rapid rate and in a small interval of time.

That portion of. the cam next fol-lowing in the direction of rotation and marked wi nd-down is employed for the winding down of the wing rail or corresponding elevation of the spindle rail and the extent'of movement at that time and the interval which is consumed for that movement may be altered within limits a-nd, preferably, is so regulated that about one andone-half turns of yarn are wound at a relatively long pitch, down the outside of the package, and to a point spaced above the butt of the bobbin so that the diameter of the package at that point will approximate the diameter of the bobbin butt itself. Then the railsare held relatively stationary momentarily so as to permit about two or three turns of yarn to be made thereby temporarily to anchor the end adjacent the lower portion of the 7 package and in a most advantageous position for doifing and for later finding that end and withdrawing it from the package preparatory to employing the bobbin and package in a battery of a loom, either one adapted to be manually loaded although considered as an idle part, may 7 be varied somewhat so as to control the relative position of the ring and spindle rails as is most advantageous for the intended system of spinning, twisting or winding which is employed in any particular installation.

Now referring to the same figures and also to Figs. 15 and l", the wind-down cam 8! which it will be noted is directed substantially in the opposite direction from the builder cam is adapted to function upon a follower 98 shown more clearly in Figs. 2 and 5. This follower 98 is rotatable upon a short stud 99 fixed in an adjustable supporting block lilfl attached to a relatively fixed bracket l dl located above the builder motion and connected to any convenient fixed portion of the frame of the machine to which.

the'builder motion is applied. The block I99 may be adjusted vertically by an adjusting screw 1G2 and is adapted to be locked in position by the clamping bolt 183. While the cam B1 does not contact the follower 98 at all times, there is a period of time during the cycle in which that cam is in engagement with the follower. Since the follower 98 is located above the builder motion, and the other follower 51 to which cam 58 is applied is below the cam unit, the action of the two cams and the spacing of the related functioning portions thereof is oppositely disposed. In Fig. 15, the parts of the cam contour which are labeled correspondingly to the legends employed on Fig. 13 govern appropriate or similar functions. The primary purpose of this cam 5'! is to lower the entire builder motion so that it is unaffected by the traverse cam 42.

Now referring to Figs. 17 and 18 in addition to'those figures just above mentioned and discussed, the timing cam fiii has flanges forming a part thereof, the flange numbered I84 being concentric and of about extent being adapted to control the follower 9] on the gear shifter arm 96 after it has fallen or has been moved downwardly by tension spring I05, Fig. 5, and this flange I64 prevents the gears 88 and 8-9 from becoming unmeshed at that time. A second flange Hit serves to maintain follower 91 outwardly upon its periphery after that follower has been lifted outwardly or upwardly by the inclined cam part lil'l. The legends applied to angular parts of this timing cam are similar to those applied to the other cams of the group or unit and it is to be understood that these legends also indicate the position of the gears or of the shifter mechanism for the bevel gears; as they are controlled to effect the more rapid rotational movement or are withdrawn at times to revert to the pick movement.

Sector H, Figs. 19 and 20, is placed upon the same sleeve that the cam 68 is carried upon and slow to higher speed takes place. to Figs. 7, 8 and 9 in addition to the other figi1 is positioned so that the outer periphery of the sector abuts against the outer edge of flange I66. The position of the sector governs the actual length of the cam periphery upon which the follower 97 rides during building the main yarn package, or during that time the pick wheel is in control and gears 88 and 83 are out of mesh. After falling from the surface of cam IE6 or the extension provided therefor by sector "II, the spring, I35 causes the arm 96 to be drawn down until the gears become meshed at which time the relatively rapid rotation of the shaft 4'1" is imparted to the pick shaft 63 and the cam unit is then rotated at a much more rapid rate depending upon the gear ratios involved.

Provision is made for selecting that stroke of the builder motion upon which the change from Now referring a triple-armed, hooked member generally designated by numeral H2. This member H2 has a downwardly directed hook H3, a similar hook H4 directed upwardly and a third projecting part H5 which is notched as shown at H6 for the reception of a latch II'I adjacent the end of the arm 96. A spring H8 normally tends to rotate this three-armed member until the arm I I4 contacts and is stopped by pin H3 and in which position the notch H3 will engage beneath latch IN, or will actually occupy such position that 'it could make that engagement.

The fixed mechanism IilI positioned above the cam unit has adjustably attached thereto a bracket I2I! connected by bolt I2I and adjustable by movement of the parts as provided by the slots through which the said bolt is passed. This bracket I2I) having a stud I2I fixed therein carries a depending latch I22 engageable with either one hooked portion or the other of the threearmed member H2. The latch I22 has an upwardly inclined hook I23, a downwardly directed point I24 and a laterally projecting arm I25, adjacent the pivot I2I and engageable with a stop means I26. A spring I21 fixed to a collar set screwed onto the stud I2I may be suitably flexed to bear against pin I28 and to press the latch inthe proper direction.

The cam I09 functions in conjunction with the latch I22 to control it so that it may function to permit change'of movement from the slow to the rapid rate of speed selectively at either upward or downward strokes of the rail. As shown in Fig. 9, the point I24 of the latch is set to ride on the longer side I29 of the cam. Of course, spring I 21 is tensioned so as to press the point against that side of the cam. As the builder motion is moved upwardly and downwardly in repeated strokes, the point I24 slides along the said inclined edge I23 and engages against the upwardly turned hook H4 of the three-armed member. That trips the member as shown in Fig. 9, so that the notch H3 is withdrawn from beneath the latch I I! at the end of arm 96. Whenever that occurs, the arm may move downwardly providing the cam 38 has arrived at such a position that the follower 97 will be free to move past the flange I36 or an extension thereof as 12 provided by the secton II. That movement may occur only on upward strokes of the builder motion, or correspondingly controlled strokes of that movable rail of the spinning or other machine to which the builder motion has been applied.

Now, assuming that it is desired to effect a change from one movement to another during downward strokes of the builder motion, or whatever movement of the movable rail of the machine may be controlled by said downward strokes, the latch I22 is removed from the stud I2I and is replaced after reversing it as illustrated in Fig. 8. When that has been done, the hook I23 will then ride upon the shorter side I30 of the cam I09 and will be adapted to engage beneath the downwardly directed hook H3 of the three-armed member as the builder motion moves up and down. It is to be understood that the spring I2! is likewise reversed so as to press the hook I23 against cam I69 and to make certain that it must engage the co-operating part H3 at each downward stroke and to swing that three-armed member so that the notch I Ifimoves out from under latch I I? as above described. It can be seen from'the description just given, and from an inspection of Figs. 7-9, that by a simple alteration of the position of latch I22 and of its spring I21, the falling of the lever 96 may be permitted to occur only during an upward or a downward movement of the builder motion as desired. Of course, that permits meshing of the gears and the change attendant thereupon only at the end of a desired stroke.

Now referring to Figs. 4, 12 and 22, that part of the device employed for retarding the move ment of the cam unit will be described. One form of mechanism whichmay be used includes a toothed sector I3I having a projecting nose I32 attached by any suitable means to a cam I33 having a collar I34. The said cam and sector are located so as to rotate freely about the sleeves 62 as shown in Fig. 22, except as urged in a counterclockwise direction by a tension spring I35 fixed at one end to a pin I36and at its other end to a second pin I37, one 'of these being fastened to the collar I34 and the other to a part of the cam 68. Normally the sector I3I is drawn to the position illustrated in Fig. 22 by the spring at which time it stops as one edge thereof bears against a correspondingly shaped edge of the cam. Alternatively, a spring may be used to draw the sector in the opposite direction, or no spring at all need be employed. The main purpose in using a spring is to preventfree or uncontrolled movement of the parts.

As the cam unit is rotated, the gear drive is eventually brought into action as above described at which time, the whole unit starts to rotate at a relatively rapid speed and the time consumed after meshing of the gears and before the cam part IIJI would again cause the gears to be sepa rated and the pick movement to beresumed may, for certain purposes, be too short. The retardation provided by the means herein described, and including the sector and cam, serves to lengthen that period by returning the lever 93 to a position in which the gears will be unmeshed for a certain extent of angular movement of the cams.

In actual operation rotation of the cam unit continues until the follower 91 engages against the cam I33 and pushes it against the inclined face of that cam holding it against rotation while the unit moves an elongating spring I35. That movement continues until the nose I32 strikes against the adjacent part I38 of the cam 68.

contact of or control of a worm hill which is positively rotated at such a speed as to move the sector very slowly to cause the follower s'l to move along the top surface of the cam I33 until it drops therefrom. It is to be understood that the speed at which the worm causes movement of the sector, the angular extent of the parts,

and other factors may be varied so as to cause a retardation of any reasonable desired extent.

The worm I is fixed at one end of a shaft which is in turn freely rotatable within a sleeve 141 having extending therefrom a bearing portion I42 pivoted upon a central portion of the stud 15. A bevel gear I43 is fixed at the other end of the shaft and meshes with a second bevel gear I. which is fixedly attached to gear 85 or otherwise designed to rotate therewith. Preferably, these gears and worm I49 rotate continuously, but it is to be understood that they have no particular effect upon the device until parts have moved throughout their cycle to a point where the worm threads engage the teeth of the sector. A spring I45 tends to maintain the worm downwardly so as to make proper engagement with the sector, but permits movement upwardly as thecontour of other parts may demand. After the worm has advanced the sector I3I to the end of teeth possible of engagement thereby, the follower 91 will have dropped from cam surface 139 and the more rapid rate of speed resumed. That continues until the machine is stopped to be doifed. Upon starting again after slacking the ends and dofiing, the parts are; rotated rapidly, but it must be borne in mind that the bunch builder is then in operation and that other cams are on a relatively inactive part of their periphery. Upon engagement of cam portion IN, the bevel gears are withdrawn from mesh and the slower Or pick movement again startedp Of course, it is to be understood that the operation of the entire mechanism is stopped at about that time so that the pick movement, although brought into play, does not go through its party of the cycle in building a package until the entire mechanism has been stopped and, the machine dofled.

' 7 Now referring to Fig. 6, a modification is shown in which the worm drive for the sector is replaced by a reciprocating pawl indicated by numeral I46 and having a number of teeth at its free end for the engagement of the teeth in the sector. This pawl is pivoted at I4! to one arm I48 of a double-armed lever pivoted on the stud I5, the other arm I 39. extending downwardly, or in a direction. to be engaged by a pin I56 carried by the gear I8 on shaft or stud 58.

A second pawl which functions as. a stop pawl I5] is in turn pivoted at I52 and has similar teeth for the engagement of the sector. Each of these pawls is held in place by a collar and that collar, one of which is indicated by numeral i521,

and shown in greater detail in Fig. 6a, has a spring I5 l attached thereto and tensioned in such a manner as to urge its pawl so that the teeth thereon always engage the teeth of the sector in the event the sector comes into the range of action of the pawl. lhe pivot. I52 is fixed at the end of an adjustable arm or other projection I55 fixed in some satisfactory way to the link it. These pawls are preferably held by step pins (not, shown) from falling downwardly to a point where they might interfere with parts not intended to be contacted.

In operation the rotation of gear 81' continuously brings projecting pin I into engagement with arm M9 thereby rocking that lever and imparting a movement to the pawl I 16- That periodically advances the sector in a clockwise direction as viewed from the side of the machine illustrated in Fig. 6, and the advancing movements made thereby are retained by the stop pawl. After the follower 9'5 has dropped from the earn as before explained, the gears are again meshed and the more rapid rotational movement of the cam unit very quickly completes the part of the cycle which precedes and includes stopping of the machine in dofiing position.

Now referring to Figs. 4 and 5, a knock off for the entire machine is operated by a pin I55, Fig. 10, which is inserted in some one of a plurality of holes 151m the cam 58. This pin is adapted to contact one end I58 of a two-armed lever pivoted atthe stud I5 and having a second arm I59. As shown in Fig. 4, this arm I59 has connected thereto a link I69 which extends upwardly to mechanism (not shown) forming a part of the basic machine and which, when the link is drawn downwardly, stops the machine. The pin I may be set at appropriate ones of the holes I5? so as to advance or retard the point at which. the

a knock off function is actually brought about.

Now referring to Figs. 11 and 24, the bunch building mechanism will be described. While this bunch building means is not, claimed as novel here, it will be described in enough detail to identify the parts and to interrelate its operation Withth-at of the remainder of the builder motion. A sector generally indicated at numeral iEI has an arm I62 by means of which it is pivoted on a stud (not shown) projecting from the main builder arm. At the end of the arm a sector IE3 is provided with widely spaced teeth I6 3 and more closely spaced teeth I65 at one end. The teeth I it and I65 are adapted to mesh with normally out teeth I 65 in a gear fixed to the shaft 43 which also carries the traverse cam.

A toothed pinion It? is fixed adjacent the pivot at the end of arm I52 and these teeth are engaged by a claw or pawl I68 intermediate the ends of an arm E59 pivoted at Ill} as. indicated in Fig. 2.

his arm IE9; is urged in a direction to maintain the engagement between the claw and teeth in the pinion I57 by a coil spring I'H.wound about or held by a collar on that stud or pivot I10 and also hooked over the arm itself.

An inclined or cam portion I72 at the free end of arm I69 serves, when engaged by a pin I13 which is, as shown in Fig. 10, fixed in one face-cf the worm gear cc, to move the arm. against the tension of spring I'II thereby to release the bunch builder sector.

The pin I13 may be adjusted to whatever position is desirable to time the releasing of the bunch builder thereby to permit it to be swung up by meansof aspring FM, Fig. 24, retained within a collar E75 fixed to that pivot upon which the sector is mounted and attached at its other end within an opening, or in any other manner, to the pinion I51. The series of holes, one of which is indicated by numeral I16, serves to retain a stop pin engageable with some fixed part of the mechanism, to limit the upward movement of the bunch builder and thereby to limit the extent of its action and to determine the size of bunch, the formation of which is controlled thereby. The sector is actually to be moved upwardly or to be released for such movement under the influence of Spring I14 just before the builder arm is forced downwardly by cam 61. Then upon resumption of winding after doffing, that member will be in position to affect the traverse of the builder motion and to limit it to only a fraction of the extent which it would normally take. The teeth I64 serve in conjunction with the teeth I66 to effect a short traverse thereby to build a satisfactory bunch after which the movement of the sector out of engagement with that pinion permits the full effect of the traverse cam to be realized and building of the main portion of the package to start. As the sector is moved about its pivot by rotation of the pinion, the pawl I68 engages teeth upon the pinionl'dl to prevent any return movement of the sector, and finally to hold it in its inactive position.

Now referring to Figs- 7 and 8, a modification of the device is illustrated. This modification is devoted to the winding of a warp wound package and change in certain cams is necessary in addition to the substitution of a slight amount of different mechanism to be carried by the main builder arm and for the purpose of causing the building of the warp package rather than a Weftwound package. A slotted segment I16 is suitably attached to move with the main builder arm and it is to be understood that in forming a warp wound package that the auxiliary builder arm need not be employed. The flexible link by means of which motion of the builder is imparted to the ring rail, and which terminates in a turnbuckle 39 and clevis I11, is connected by a pin I18 to slide within the arcuate slot I19 cut in the member 16. A link I80 is in turn connected at one end to the pin I18, and at its other end by a pin IBI, to one of the openings provided adjacent the end of an arm I82. This arm I82 is connected to or forms a part of an arcuate member I83 pivoted at a suitable point on the main builder arm and having a follower I84 at one end and a similar follower at its opposite end (not shown) but understood by those skilled in' the art since this part of the mechanism is conventional. These followers are engaged by a cam I85 which, of course, differs from the builder cam heretofore described since its function is to control the winding of a different type of package. In action, the movement of the center or pivot I18 proceeds slowly and at any desired rate in combination with the speed of the other parts, from one end to the opposite end of the slot I19. That provides for shortening the stroke as the package is built, although, as is well known, in this type of winding the stroke usually proceeds from one end of the package to the other.

Operation Now that specific embodiments of the mechanism itself have been described, its operation will be briefly referred to with respect to winding a typical yarn package. As seen in Fig. 23, a package 135, herein shown as a weft-wound package of more or less conventional type, has been formed on a conventional shuttle bobbin having a butt I81 and a spindle terminating in a tip I88.

At the start of winding, assuming the winding to be either in a spinning, twisting, or winding machine, the parts may be assumed to be stationary, but set with the bunch bluilder ISI tripped to its active position and with the builder arms in their fully lowered or extreme position. At that time the traverse cam 42 has little or no effect and rotation of shaft 43 upon starting the device will merely rock the main builder arm to and fro as the teeth I56 engage the teeth I34 on the sector I53. Upon completion of movement of the pinion and its teeth I66 past the teeth I65, the bunch building function is completed and that mechanism retires from operation.

The cam I42 then causes a to and fro movement of the builder mechanism about its pivot and the ring or spindle rail, as the case may be, will be traversed that requisite distance necessary for the particular package being wound. By this time the gears 88 and 89 are not meshed since the follower 91 upon the arm 96 is riding upon the fiange I06 of cam 68. The pick motion operating through worm 6E and worm wheel 60 rotates the cam unit slowly so that the auxiliary builder arm 49 will partake of independent movement relatively to the main builder arm in addition to its to and fro movement governed by the traverse cam. That continues until the package has been completed up to a desired point whereupon the follower 91 will drop from the flange I 06, or an extension thereof as governed by the sector 1 I, in the event that is set'to continue the said flange. Assuming a package of the type shown in Fig. 23 is being formed, the movement of the cam unit and of other parts is immediately speeded up upon dropping of the follower 91 to the central portion of the cam 98 and the builder cam 58 then functions through its engagement with follower 51 quickly to lower the auxiliary builder arm 40 to wind down the tail I89 as steeply as may be desired, it being understood that the curvature of the cam and the relative speed imparted by the gears 88 and 89 permits more or fewer convolutions to be wound in a given length of package.

It is desirable to terminate the winding of the tail 1' 89 at a short distance above the bobbin butt I81 so that a few turns of yarn may be secured about the package slightly above the lowermost portion thereof and at a point where the diameter of the package closely approximates the diameter of the butt itself. Thus a number of turns I are formed at that point, and for that purpose, it is desired to stop the movable rail briefly.

If desired the delay mechanism may be employed at this point so as to shift from the very rapid gear drive to a slower movement as provided by either onev of the delay mechanisms heretofore described in detail. As the delay mechanism is approached, that is, as the follower 91 strikes the cam I33, Fig. 12, it pushes that cam and its attached, toothed sector to the extremity of its travel whereupon the gears are disengaged as the follower moves up to the top surface I39. For that period of time required for the delay movement to impart a small angular travel to the cam I33, the parts remain in substantially that position occupied at the unmeshing of the'gears, but then cause a reengagement thereof as the follower 91 drops from the surface I39. That delay may be just long enough and may be appropriately regulated so as to 17 Wi d the turns I wh r upo s i h further movement will serve to lower the ring rail, or appropriately move the spindle rail, so that the parts then occupy a desired dofling position. The ends wound at the point ltd serve very well to permit dofiing without catching the thread at the crevice between the bobbin butt and the lower part of the wound package, or without catching it in the grooves between the positioning rings adjacent the central portion of the bobbin butt.

Further movement of the parts returns the mechanism to its initial or starting position, the Wind-down cam 61 functioning against follower 98 to move the main builder arm down away from the traverse cam and to permit the bunch building sector I63 to move to operative position as its catch is released upon contact of the pin I13 with a co-operating surface of the arm I69. The follower 9'! will at that time move outwardly as controlled by the cam portion Iii! on the cam 68 and the entire machine will be stopped by the knock off mechanism, the control for that function being initiated by engagement of a pin I56 with the arm I58 of the knock oil controlling lever.

It is to be understood that the direction of movement of the builder arms and of the movable rail and the point at which change of speed occurs may be selectively determined. The change of speed from the pick motion to the gear .drive and thus the return of the parts started after a complete movement in the upward direction, or vice versa, as the case may require. That movement, as above described, is entirely controlled by placement of the latch member I22 and its tension spring.

In the event a so-called tip hunch is to be wound, the change from pick movement to the more rapid gear drive is caused to occur at termination of winding the main yarn package and, instead of immediately lowering the ring rail, or returning the parts toward their doffing position, the contour of the builder cam is so devised as to move auxiliary builder arm 40 upwardly and raise the ring rail for a short distance so as to position the parts for winding the tip bunch itself. The parts linger in that position just long enough to wind that bunch, and, if desired, the delay mechanism may operate at that point. After the tip bunch has been completed, the cam 58 then causes the return movement of the parts toward the doffing position and may stop the winding of the tail I89 at any point desired.

The Warp-wound package of Fig. 23a is formed by a more or less standard procedure, but as governed by the builder motion herein described. The package is wound on a tube It! which may have a metal ferrule IfiZ at its lower end. These tubes are of substantially the same diameter from tip to the ferrule at the base.

The winding of the main package is preferably terminated a short distance above the base and a tail I93 then wound down spirally to a point about midway of the lower terminus of the package and the ferrule. There a few turns I94 of yarn serve to anchor the end and to facilitate doffing and later finding the end when the package is subsequently utilized. The same or a similar practice is capable of being used with combination type winds.

It will be obvious that other types of packages may be wound, some being variations of the Wef type package and others variations of the warp wound package. It does not appear necessary to 18 describe these in detail at this point since they are well known to those skilled in the art.

It is to be understood that the delay mechanism is not necessary to the winding of a tip bunch, nor is it necessary to winding the turns I at the lower part of the package as above described and illustrated in Fig. 23. The cams themselves may be formed in accordance with any desired contour and the contour of the cam may cause the tip bunch to be wound after slight raising of the ring rail and before lowering that rail. It is also possible to so devise the contour of the cams that the turns I90 will be formed in that manner. The delay mechanism is, however, very advantageously employed when an enlarged bunch is to be wound, or at such time as it is desired to hold the rotation of the cam unit so as to conserve angular movement thereof as is frequently necessary if the tip bunch, tail wind and the control of the rail for dofiing is to be divided up into difierent phases and require separate treatment.

The change from a set up adapted to control the winding of one particular type of bobbin to something widely different may be quickly effected by removing the cam unit and by substituting other cams, that requiring only a small expenditure of time and thus not necessitating loss of production of the entire machine as would be necessary if a different builder motion were to be installed or if rather drastic changes were at that time necessary.

The part played by the operator becomes less critical when the builder motion herein described is employed since practically all phases of the cycle are completed automatically and without the necessity of exercising any great degree of m nual judgment or skill.

While one preferred embodiment and certain modifications of the invention have been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This application is, therefore, not to be limited to the precise details described, but is intended to cover all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

I claim:

1. A builder motion for spinning machines and the like which has a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm, and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement thereto which comprises a cam group including a builder cam, a wind-down cam and a timing cam, means carried by said main builder arm upon which said cams are rotatably mounted, a follower on said auxiliary builder arm bearing upon said builder cam, a sec ond follower and a support therefor fixed relatively to said builder motion against which said wind-down cam bears, and means for rotating said cam group as a unit throughout a predeter- 19 mined angular extent during each cycle of operation.

2. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement thereto which comprises a plurality of cams including a builder cam, a wind-down cam and a timing cam, means supported by said main builder arm upon which said cams are rotatably retained, a follower on said auxiliary builder arm bearing upon said builder cam, a second follower and a support therefor fixed relatively to said builder motion against which said wind-down cam bears, and means for rotating said cam group as a unit throughout a predetermined angular extent during each cycle of operation.

3. Mechanism as defined in claim 2 wherein said builder cam is provided with an active portion engageable with the follower on the auxiliary builder arm at all times, the wind-down cam having a portion thereof of such contour and extent as to engage the relatively fixed follower at a time when the movable rail has moved toward its dofiing position and of such contour as to move the main builder arm to a position where its follower will not be engaged by the traverse cam.

4. Mechanism as defined in claim 2 wherein the said timing cam comprises a main portion adapted to be mounted in relatively fixed position relatively to the builder and wind-down cams of the unit, flanges projecting laterally from the cam and having such circumferential relationship with respect thereto as to hold a gear shifting means in or out of an active position, a sector of similar curvature and having its active surface located at substantially the same radial extent outwardly as the said flanged portions, and means for oircumferentially adjusting said sector to increase the extent of one of said cir cumferential flanges thereby to vary the position at which the change from pick movement to the relatively rapid rate of drive shall occur.

5. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and a means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversin movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxilary arm relatively to the main arm to impart package building movements and a return movement thereto which comprises a spindle projecting from; and

carried by said main builder arm, a plurality of cams rotatable on said spindle, said cams including a builder cam, a wind-down cam and a timing cam, a follower on said auxiliary builder arm against which said builder cam bears and by which the movements to be imparted thereby are conveyed to the auxiliary arm, a support fixed relatively to said builder motion and a follower carried by said support against which the said wind-down cam bears, and means for rotating said cams as a unit throughout a predetermined angular extent during each cycle of operation, said means comprising a pick motion and a relatively rapid gear drive, and means controlled by said timing cam for determining that portion of the cycle during which the said cams shall be controled by said pick motion and by said rapidly rotating gear movement.

6. A builder motion for spinning machines and 1e like which have a rail to be traversed and a traverse cam which-comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said buider arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement which comprises a plurality of cams including a builder cam, a, wind-down and a timing cam, means including a spindle carried by and projecting from said main builder arm upon which said cams are rotatably mounted, a follower on said auxiliary builder arm bearing against said builder cam, a support fixed relatively to said builder motion and a follower carried by said support against which the said wind-down cam bears, and means for rotating said cams as a unit throughout a single revolution during each cycle of operation, said means comprising a worm gear fixed for relative rotation with said cams, a pick shaft and a worm on said pick shaft meshing with said worm gear, a pick movement at one end of said pick shaft, and, at the other end, gear driving means adapted to be rotated at constant speed, and means controlled by said timing cam for interconnecting said gear driving means with said pick shaft to rotate the said shaft and the cam group at a relatively rapid rate of speed as compared to that rate of speed at which it is rotated by said pick motion.

'7. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting thetrav rsing motion of said main builder arm tothe auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main:

arm to impact package building movements and a return movement which comprises a plurality of cams including a builder cam, a wind-down cam and a timing cam, means supported by said main builder arm upon which said cams are rotatably retained, a follower on said auxiliary builder arm bearing upon said builder cam, a second follower and a support therefor fixed relatively to said builder motion against which said wind-down cam bears, and means for rotating said cam group as a unit throughout a predetermined angular extent during each cycle of operation which means comprises a worm gear fixed to said cam group, a pick shaft having fixed thereto a worm engage able with said worm wheel, a pick wheel and a pawl movement for said pick wheel at one end of said shaft and means adjacent the other end of said shaft for rotating said shaft and the cam group at a relatively rapid rate of speed comprising a continuously rotating shaft, gears, one carried by said relatively rapidly rotating shaft and another carried by said pick shaft and clutch means for meshing said gears at predetermined times as controlled by said timing cam, said means comprising a gear-shifting fork and a lever movable for imparting motion to said fork, said lever having projecting therefrom a follower adapted to engage and to be controlled by a cam contour formin a part of said timing cam.

8. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveyin traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement which comprises a plurality of cams including a builder cam, a wind-down cam and a timing cam, means supported by said main builder arm upon which said cams are r0- tatably retained, means including interconnecting bolts by which said cams are attached together to be rotated as a unit, a follower on .said auxiliary builder arm bearing upon said builder earn, a second follower and a support therefor fixed relatively to said builder motion against which said wind-down cam bears, and means for rotating said cam group as a unit throughout a predetermined angular extent during each cycle of operation including a worm wheel and means by which said Wheel is attached to said cam group for rotating it, a pick shaft and a worm on said shaft for engagement with said worm wheel, a pick wheel and a pawl for imparting movement thereto at one end of said shaft and a gear drive for the opposite end of said shaft, said gear drive being adapted to rotate said shaft at a relatively great rate of speed as compared to that speed at which the pick wheel rotates it and means for selectively controlling the intermeshing of said gear drive in accordance with certain cam contours on said timing cam.

9. A builder motion for spinning machines and the like which have .a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm, and simultaneously moving said auxiliary builder arm relatively to the main arm to impact package buildingmovements and a return movement thereto which comprises a shaft projecting from the main builder arm, a rotatable sleeve on said shaft, a plurality of cams on said sleeve and interconnecting means by which said cams are attached for rotation as a unit, but are readily detachable for substitution of other and different cams, said cams including a builder cam, a wind-down cam and a timing cam, a follower on said auxiliary builder arm bearing upon said builder cam, a second follower and asupport therefor fixed relatively to said builder motion against which said Wind-down cam bears at predetermined intervals, and means for rotating said cam group as a unit which includes a pick shaft, a pick motion fixed at one end thereof for rotating said shaft, a gear drive fixed at the other end of the shaft for rotating said shaft at a speed greater than that imparted by the pick motion, gears, one on said shaft and one fixed to said sleeve, for imparting rotation from said pick shaft to said sleeve by means of which the cam group are moved, and control means for meshing and for withdrawing from mesh said gear drive, the movements of said control means being determined by the cam contours on said timing cam.

10. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, .a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement thereto which comprises a plurality of cams including a builder cam, a wind-down cam and a timin cam, means supported by said main builder arm upon which said cams are rotatably retained, a follower on said auxiliary builder arm bearing upon said builder cam, a relatively fixed support and a follower carried thereby against which said wind-down cam bears and means for rotating said cam group as a unit throughout a predetermined angular extent during each cycle of operation, means responsive to changes in contour of the timin cam for regulating the speed of said rotating means and changing to and from a relatively slow and. a rapid rate of speed, and control means for selectively permitting said change of speed to occur only during an upward movement of the builder arm or during a downward movement thereof.

511. Mechanism as defined in claim 10 wherein said means for selectively permitting change of speed to occur only at predetermined movement of the builder arm comprises a latch member for withholding the control means for effecting gear change from dropping from the co-operating portion of the timing cam, an upwardly directed hooked portion on said latch member and a similarly downwardly directed hooked part thereof, means positioned on a relatively fixed part of the device and reversible from one position to another so as to affect selectively either one or the other of said hooked members and constructed to release the latch in one instance upon upward movements of the builder motion, but when reversed to its other position to release the latch only upon downward movement thereof.

12. Mechanism as defined in claim wherein said means for selectively permitting changeof speed to occur only during intended directions of movement of said builder arm comprises a threearmed member one arm of which extends upwardly and has a notch therein for engagement with a projection on that lever which controls the change of position of the movable bevel gear thereby to prevent meshing of the gears until withdrawn, a hooked lateral projection extending upwardly and a, second and similar projection directed downwardly, cam means associated with this three-armed member for permitting only the ends of said hooked, lateral parts to project, a latch member pivoted to a fixed portion of the machine and generally positioned in alignment with the pivot of said member, said latch member being spring urged in a direction to engage the said cam member and having an upwardly directed hooked claw and a downwardly extending point, the said downwardly extendin point being adapted to slide along one side of the cam member and to engage the upwardly directed, lateral, hooked part of the three-armed member when in one position, but when reversed to the opposite position, having its upwardly directed claw engageable with the opposite or downwardly directed hooked, lateral projection of the threearmed member, thereby to trip the said member only upon desired strokes of the builder motion.

13. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm. a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement thereto which comprise a plurality of cams including a builder cam, a winddown cam and a timing cam, means supported by said main builder arm upon which said cams are rotatably retained, a follower on said auxiliary builder arm bearing upon said builder cam, a relatively fixed support and a follower carried thereby against which said wind-down cam bears,

and means for rotating said cam group as a unit nation of an upward or a downward movement of the auxiliary builder arm, which comprises a latch member carried by the said relatively fixed support and adapted to afiect said withholdin pawl during that stroke of the builder motion during which said speed change is selectively to be effected.

14. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveying traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for imparting movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement thereto which comprises a plurality of cams including a builder cam, a wind-down cam and a timing cam, means supported by said main builder arm upon which said cams are rotatab-ly retained, a follower on said auxiliary builder armbearing upon said builder cam, a second follower and a support therefor fixed relatively to builder motion against which said winddown cam bears, and means for rotating said cam group as a unit throughout a predetermined angular extent during each cycle of operation, and means for changing the speed at which said means for rotating the cam group operates comprising gear-meshing devices controlled by said timing cam and auxiliary means controlled by said timing cam and effective for a relatively small angular extent of said cycle of operation for moving the then active portion of the timing cam at a speed slower than the said relatively rapid rate of speed, but faster than that speed imparted by the means which effects the said relatively slow rate of movement.

15. A builder motion for spinning machines and the like which have a rail to be traversed and a traverse cam which comprises in combination, a main builder arm, an auxiliary builder arm and means upon which said builder arms are pivoted, a follower on said main builder arm for engagement by the traverse cam and for conveyin traversing movements from the cam to the arm, a connecting means attached at the free end of said auxiliary builder arm for impartin' movements thereof to that rail on said machine which is to be traversed, and means for imparting the traversing motion of said main builder arm to the auxiliary builder arm and simultaneously moving said auxiliary arm relatively to the main arm to impart package building movements and a return movement which comprises a plurality of cams including a builder cam, a wind-down cam and a timing cam, means supported by said main builder arm upon which said cams are rotatably retained, a follower on said auxiliary builder arm bearing upon said builder cam, a supporting means for mounting in a relatively fixed position with respect to said builder motion and havin thereon a follower against which said wind-down cam bears, and means for rotating said cam group as a unit which comprises a Worm gear fixed to and rotatable with said cam group, a pick shaft and a worm carried by said pick shaft and meshing 

